Electric socket



April 1929- L. SMITH ET AL 1,710,717

ELECTRIC SOCKET Filed Dec. 29, 192'! gwomtoq,

L. Smzl/z a :iw oaii V Patented Apr. 30, 1929.

UNITED STATES PATENT OFFICE.

ELECTRIC SOCKET.

Application filed December 29, 1927. Serial No. 243,355.

This invention relates to new and useful iu'iprovemcnts in electric sockets, and particularly to sockets especially adapted for receiving electrical lamps, of the screw-stem type, or for screw plugs.

lhe principal object of the invention is to provide a fixture, containing a light socket, wherein are means for absorbing any shocks or jars, whereby to protect the filament of the lamp.

Another object is to provide, in a fixture oi this character, means for properly maintaining electrical connections with the sock et, while at the same time providing for a limited movement of the socket, in numerous directions, with spring means for absorhing the shocks.

Other objects and advantages will be apparent from the following description when taken in connection with the accompanying drawing.

In the drawing:

Figure 1 is a view looking into the socket.

-Figure a vertical transverse sectional view on the line 22 of Figure 1.

Figure 3 is a plan View of the socket, removed from the cup 10.

Referring particularly to the accompanying drawing, represents an insulated cup having the base flange .11, which is apertured tor the reception of nails, or screws, for the purpose of attacl'iing the cup to a support. Formed crtically in the inner face of the wall ot' the cup. and at din.i'netrically opprr sitc points, are the gri'ioves 12. Disposed centrally within the cup is the screw socket .125, and sccured to the outer face of the said soi -kiw and radiating therefrom, are the stems ll, each of which is disposed slidably in a .Q'IOOYG 12, of the wall of the cup 10. In the bottom of thc socket the central cont-act screw or bolt extends through the center of the bottom of the cup, and encircling said bolt is a coil spring 16, one end of which is metallically connected to the bolt, while the other end extends through the bottom of the cup and is connected with a binding screw 17, on the flange ll. At the diametrically opposite point on the flange 11 there is secured a similar binding screw 18. Encircling each of the stems 14 is a coil spring 18, one end of which is metallically connectcd with the shell of the socket, while the other end extends out through a small opening 19, in the cupwall, and is connected with the said binding screw 18. A cover is secured to the upper edge of the wall of the cup, and is provided with a central open ing 21, of somewhat greater diameter than the socket 123, said opening being provided for the purpose of engaging a lamp in the socket, and removing the lamp therefrom.

hen the cup is properly fixed to a support, and a lamp screwed into the socket, it will be readily understood that the springs 16 and 18 hold the socket yieldably in its proper position within the cup, but that upon a jar or shock being imposed on the support, or the cup, such jar or shock will be absorbed by said springs, whereby the socket, and the contained lamp will be protected from injury.

Whatis claimed is:

1. An electric fixture including an insulated cup, a metal socket therein, means on the socket slid-ablyengaged with the wall of the cup. and resilient means on the first means between the socket and cup.

2. An electric fixture including an insulated cup, a metal socketwithin the cup, radiating arms on the socket slidably en gaged with the cup, and resilient means on the arms between the socket and cup.

3. An electric fixture including an insulated cup, a metal socket within the cup, binding terminals on the cup, radial arms on the shell of the socket, grooves in the cup slidably' receiving the arms, springs between the shell and the cup connected with one of the terminals, anda spring connected with the central contact of the socket and with the other terminal.

In testimony whereof, we aflix our signatnres.

LLOYD SMITH. JOHN W. SCOTT. 

